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Property, Plant and Equipment
 12 Months Ended
Apr. 30, 2020
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Property, Plant and Equipment
 
The components of property, plant and equipment were:
 
APRIL 30
(in thousands)
2020

2019
Land
$
4,431


$
4,751

Buildings and improvements
120,819


114,421

Buildings and improvements - financing leases
11,636


11,202

Machinery and equipment
312,806


294,993

Machinery and equipment - financing leases
30,911


30,574

Construction in progress
8,164


7,002


488,767


462,943

Less accumulated amortization and depreciation
(284,943
)

(254,680
)






Total
$
203,824


$
208,263



Amortization and depreciation expense on property, plant and equipment amounted to $36.9 million, $36.2 million and $21.9 million in fiscal years 2020, 2019 and 2018, respectively.  Accumulated amortization on financing leases included in the above table amounted to $32.3 million and $30.8 million as of April 30, 2020 and 2019, respectively.